42 BULLETIN" 123, UNITED STATES NATIONAL MUSEUM. 



termined are mostly referable to corculana Zeller. The latter is a 

 variable species so far as color is concerned, some Colorado speci- 

 mens shading into a bright brownish red. The usual brown color 

 is however decidedly more fuscous than ferruginous. 



Male genitalia figured from specimen in National Collection from 

 Verdi, Nevada (A. H. Vachell, "June 1-10"). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes: Nevada, Oregon, Colorado, 

 California, British Columbia. 



Alar expanse. — 14-18 mm. 



Type.-— hi British Museum. 



Type locality. — Vancouver Island. 



Food plant. — ^Unknown. 



12. TmODIA OCHROCBPHALA (Walsingham). 



Semasia ochrocepJuila Walsingham, Trans. Ent. Soc. Lond., 1895, p. 513. 

 Thiodia ochrocephala Feenald, in Dyar List N. Amer. Lepid., no. 5203, 1903. 

 Eucosma ochrocephala Baenes and McDunnough, Check List Lepid. Bor. 

 Amer., no. 7078, 1917. 



I have seen nothing that absolutely fits Walsingham's description 

 of this species except a new species of Suleima which I describe else- 

 where in this paper as /S. skimierana. I have hesitated to identify 

 the latter as ochracephala because of its reduced venation. Wal- 

 singham would hardly have overlooked such a character nor would 

 he have been apt to describe a species having veins 7 and 8 of fore 

 wing united as a Semasia. 



Alar expanse. — 18 mm. 



Type. — In British Museum. 



Type locality. — Loveland, Colorado. 



Food plant. — ^Unknown. 



13. THIODIA AMPHORANA (Walsingham). 

 (Fig. 86.) 



Semasia amphorana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 1879, 



p. 63. 

 Thiodia amphorana Feenald, in Dyar List N. Amer. Lepid., no. 5184, 1913. 

 Eucosma amphorana Baenes and McDunnough, Clieclr List Lepid. Bor. Amer., 



no. 7060, 1917. 



A striking species not easily confused with anything else in the 

 genus. The hind wing venation varies somewhat in different speci- 

 mens, some having veins 3 and 4 united while others have them 

 stalked. 



Male genitalia figured from specimen in National Collection from 

 Alameda County, California ("April"). 



